import axios from 'axios'
import { ElNotification , ElMessageBox, ElMessage, ElLoading } from 'element-plus'
import { getToken } from '@/utils/auth'
import errorCode from '@/utils/errorCode'
import { tansParams, filterParams, blobValidate } from '@/utils/ruoyi'
import cache from '@/plugins/cache'
import { saveAs } from 'file-saver'
import useUserStore from '@/store/modules/user'
import router from '@/router'
let downloadLoadingInstance;
// 是否显示重新登录
export let isRelogin = { show: false };

axios.defaults.headers['Content-Type'] = 'application/json;charset=utf-8'
// 创建axios实例
const service = axios.create({
  // axios中请求配置有baseURL选项，表示请求URL公共部分
  baseURL: import.meta.env.VITE_APP_BASE_API,
  // 超时
  timeout: 10000
})

// request拦截器
service.interceptors.request.use(config => {
  if (!config.data) config.data = {}
  // 是否需要设置 token
  const isToken = (config.headers || {}).isToken === false
  // 是否需要防止数据重复提交
  const isRepeatSubmit = (config.headers || {}).repeatSubmit === false
  if (config.formData) {
    config.headers['Content-Type'] = 'multipart/form-data' // 表单提交，设置请求头
    if (config.data) {
      const formData = new FormData()
      for (const [key, value] of Object.entries(config.data)) {
        if (value instanceof Array && value.length){
          for (var i = 0; i < value.length; i++) {
            formData.append('files', value[i]);
            // formData.append(key, ...value)
          }
        } else {
          formData.append(key, value)
        }
      }
      config.data = formData
    }
  }
  if (getToken() && !isToken) {
    config.headers['Authorization'] = 'Bearer ' + getToken() // 让每个请求携带自定义token 请根据实际情况自行修改
  }
  // params参数构建
  if (config.params) {
    config.params = filterParams(config.params)
    let url = config.url + '?' + tansParams(config.params);
    url = url.slice(0, -1);
    config.params = {};
    config.url = url;
  }
  if (!config.formData) {
    config.data = filterParams(config.data)
  }
  if (!isRepeatSubmit && (config.method === 'post' || config.method === 'put')) {
    const requestObj = {
      url: config.url,
      data: typeof config.data === 'object' ? JSON.stringify(config.data) : config.data,
      time: new Date().getTime()
    }
    const sessionObj = cache.session.getJSON('sessionObj')
    if (sessionObj === undefined || sessionObj === null || sessionObj === '') {
      cache.session.setJSON('sessionObj', requestObj)
    } else {
      const s_url = sessionObj.url;                // 请求地址
      const s_data = sessionObj.data;              // 请求数据
      const s_time = sessionObj.time;              // 请求时间
      const interval = 100;                       // 间隔时间(ms)，小于此时间视为重复提交
      if (s_data === requestObj.data && requestObj.time - s_time < interval && s_url === requestObj.url) {
        const message = '数据正在处理，请勿重复提交';
        console.warn(`[${s_url}]: ` + message)
        return Promise.reject(new Error(message))
      } else {
        cache.session.setJSON('sessionObj', requestObj)
      }
    }
  }
  return config
}, error => {
    console.log(error)
    Promise.reject(error)
})

// 响应拦截器
service.interceptors.response.use(res => {
    // 未设置状态码则默认成功状态
    const code = res.data.code || 200;
    // 获取错误信息
    const msg = errorCode[code] || res.data.msg || errorCode['default']
    // 二进制数据则直接返回
    if (res.request.responseType ===  'blob' || res.request.responseType ===  'arraybuffer') {
      return Promise.resolve(res)
    }
  if (code === 401) {
      if (!isRelogin.show) {
        isRelogin.show = true;
        ElMessageBox.confirm('登录状态已过期，您可以继续留在该页面，或者重新登录', '系统提示', { confirmButtonText: '重新登录', cancelButtonText: '取消', type: 'warning' }).then(() => {
          isRelogin.show = false;
          useUserStore().logOut().then(() => {
            router.replace({
              path: '/login',
            })
          })
      }).catch(() => {
        isRelogin.show = false;
      });
    }
      return Promise.reject('无效的会话，或者会话已过期，请重新登录。')
    } else if (code === 500) {
      ElMessage({ message: msg, type: 'error' })
      return Promise.reject(new Error(msg))
    } else if (code === 601) {
      ElMessage({ message: msg, type: 'warning' })
      return Promise.reject(new Error(msg))
    } else if (code !== 200) {
      ElNotification.error({ title: msg })
      return Promise.reject('error')
    } else {
      return  Promise.resolve(res.data)
    }
  },
  error => {
    let { message, response = {} } = error;
    const { data = {} } = response
    const { msg = '', code = 500 } = data
    if (message == "Network Error") {
      message = "后端接口连接异常";
    } else if (message.includes("timeout")) {
      message = "系统接口请求超时";
    } else {
      message = errorCode[code] || message.substr(message.length - 3)
    }
    ElMessage({ message: msg || message, type: 'error', duration: 5 * 1000 })
    return Promise.reject(error)
  }
)

// 通用下载方法
export function download(config) {
  downloadLoadingInstance = ElLoading.service({ text: "正在下载数据，请稍候", background: "rgba(0, 0, 0, 0.7)", })
  return service({
    ...config,
    responseType: 'blob'
  })
    .then(async (res) => {
      if (!res || !res.data) {
        ElNotification.error({ title: '下载文件出现错误，请联系管理员！' })
        return Promise.reject(res)
      }
      try {
        let fileName = config.fileName || '下载文件'
        if (res.headers['content-disposition']) {
          // 切割文件名
          const fileNameEncode = res.headers['content-disposition'].split('filename=')[1] || ''
          // 解码文件名
          const fileNameDecode = decodeURIComponent(fileNameEncode.match(/"([^"]*)"/)[1])
          fileName = fileNameDecode
        }
        const isBlob = blobValidate(res.data);
        if (isBlob) {
          const blob = new Blob([res.data])
          saveAs(blob, fileName)
          downloadLoadingInstance.close();
          ElMessage.success('下载成功');
          return Promise.resolve(res)
        } else {
          const resText = await data.text();
          const rspObj = JSON.parse(resText);
          const errMsg = errorCode[rspObj.code] || rspObj.msg || errorCode['default']
          ElMessage.error(errMsg);
          return Promise.reject(errMsg)
        }
      } catch (error) {
        return Promise.reject(error)
      }
    })
    .catch((r) => {
      ElMessage.error('下载文件出现错误，请联系管理员！')
      downloadLoadingInstance.close();
    })
}

export default service
